The guzheng, also spelled gu zheng or gu-zheng (Chinese: 古箏; pinyin: gǔzhēng, with gu 古 meaning "ancient"; and also called zheng (箏) is a Chinese plucked zither.

The guzheng is the modern Westernized descendant of an ancient traditional instrument which was the ancestor of the Japanese koto, the Mongolian yatga, the Korean gayageum, and the Vietnamese đàn tranh. The parent instrument of the guzheng was known as the se.
The guzheng should not to be confused with the guqin (another ancient Chinese zither but a fewer number of strings and without bridges).